a.underline
{
    text-decoration: none;
    display: inline-block;
    position: relative;
}

a.underline::after
{
    content: '';
    position: absolute;
    width: 100%;
    transform: scaleX(0);
    height: 1px;
    bottom: 0;
    left: 0;
    background-color: var(--white);
    transform-origin: bottom right;
    transition: transform 0.25s ease-out;
}

a.underline:hover::after
{
    transform: scaleX(1);
    transform-origin: bottom left;
}